The governor of the Austrian Netherlands, Count Kaunitz, was forced to withdraw his administration north to Antwerp. The siege severely damaged his view of Austria's allies, principally Britain and the Dutch Republic, who he considered had done virtually nothing to protect Brussels from the French. A decade later Kaunitz would be one of the architects of the Franco-Austrian Alliance in which Austria abandoned its former alliance with Britain and joined with its traditional enemy France.

The French followed up the capture of Brussels by taking other key cities and fortresses in the Austrian Netherlands including Mons and Namur. Brussels remained under French occupation until it was returned to Austria by the 1748 Treaty of Aix-la-Chapelle along with the rest of the Austrian Netherlands, although it was January 1749 before the French finally evacuated the city.[5]